Saginaw County Sheriff's Lt. Randy Pfau has said loss prevention staff at the store reported seeing Rastall push his shopping cart past the checkout lanes and out the exit of the store.

After staff approached him and asked him to return to the store, an "altercation occurred" in which Rastall pulled out a knife to escape, Pfau said.

Rastall left in his vehicle without the merchandise, but Saginaw Valley State University police officers performed a traffic stop on his vehicle as he left and took Rastall into custody without further incident, Pfau said.

Pfau said the approximate value of the merchandise Rastall was attempting to steal was $1,755.

The robbery charge Rastall faces carries a maximum penalty of life in prison while the assault charge, also known as assault with a dangerous weapon, carries a four-year maximum penalty.

Now that he's in Circuit Court, Rastall either will proceed to trial, plead as charged, or accept any possible plea agreement.

Rastall remains jailed on a $40,000 bond.

— Andy Hoag covers courts for MLive/The Saginaw News. Email him at ahoag@mlive.com or follow him on Twitter @awhoag